Nonperturbative quantum electrodynamics in a photon-condensate background field

1988 ◽  
Vol 38 (11) ◽  
pp. 3578-3581 ◽  
Author(s):  
Y. Kikuchi ◽  
Y. J. Ng
Keyword(s):  
Quantum Electrodynamics ◽  
Background Field ◽  
Nonperturbative Quantum Electrodynamics

scholarly journals Two-loop renormalisation of gauge theories in 4D implicit regularisation and connections to dimensional methods

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
A. Cherchiglia ◽  
D. C. Arias-Perdomo ◽  
A. R. Vieira ◽  
M. Sampaio ◽  
B. Hiller
Keyword(s):  
Quantum Electrodynamics ◽  
Dimensional Regularization ◽  
Background Field ◽  
Field Method ◽  
Loop Order ◽  
Abelian Gauge ◽  
Gauge Invariant ◽  
Yang Mills ◽  
Lorentz Algebra ◽  
Background Field Method

AbstractWe compute the two-loop $$\beta $$ β -function of scalar and spinorial quantum electrodynamics as well as pure Yang–Mills and quantum chromodynamics using the background field method in a fully quadridimensional setup using implicit regularization (IREG). Moreover, a thorough comparison with dimensional approaches such as conventional dimensional regularization (CDR) and dimensional reduction (DRED) is presented. Subtleties related to Lorentz algebra contractions/symmetric integrations inside divergent integrals as well as renormalisation schemes are carefully discussed within IREG where the renormalisation constants are fully defined as basic divergent integrals to arbitrary loop order. Moreover, we confirm the hypothesis that momentum routing invariance in the loops of Feynman diagrams implemented via setting well-defined surface terms to zero deliver non-abelian gauge invariant amplitudes within IREG just as it has been proven for abelian theories.

scholarly journals The non-Abelian gauge field propagator in a plane wave background field

2019 ◽  
Vol 97 (4) ◽  
pp. 461-463
Author(s):  
D.G.C. McKeon
Keyword(s):  
Plane Wave ◽  
Gauge Field ◽  
Quantum Electrodynamics ◽  
Background Field ◽  
Long Distance ◽  
Abelian Gauge ◽  
Plane Wave Background ◽  
Distance Limit

Employing methods introduced by Schwinger in quantum electrodynamics, we compute the propagator for a non-Abelian gauge field in a plane wave background field. In the long distance limit a mass-like term for the gauge field is induced by this interaction.

scholarly journals Nonperturbative Quantum Electrodynamics in the Cherenkov Effect

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
Charles Roques-Carmes ◽  
Nicholas Rivera ◽  
John D. Joannopoulos ◽  
Marin Soljačić ◽  
Ido Kaminer
Keyword(s):  
Quantum Electrodynamics ◽  
Cherenkov Effect ◽  
Nonperturbative Quantum Electrodynamics

Energy, Information, and Superluminal Speed in Quantum Electrodynamics

2020 ◽  
pp. 27-33
Author(s):  
Boris A. Veklenko
Keyword(s):  
Electromagnetic Field ◽  
Perturbation Theory ◽  
Quantum Electrodynamics ◽  
Excited Atom ◽  
Standard Quantum ◽  
Energy Information

Without using the perturbation theory, the article demonstrates a possibility of superluminal information-carrying signals in standard quantum electrodynamics using the example of scattering of quantum electromagnetic field by an excited atom.

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